After root canal treatment, the crown side needs to be filled, and then depending on the location of the tooth and the amount of force it is subjected to, it will be decided whether or not it needs to be crowned above it, and the best option is related to the condition of one’s own tooth. 1. Root canal treatment requires root canal filling of the tooth, and the crown side will normally use filling materials to repair the missing tooth tissue. If the tooth is missing too much or if the tooth is subjected to a large jaw force, it is usually also necessary to carry out crown repair, so the tooth needs to be filled at the same time and do crown treatment. 2. If the tooth is missing less, and is located in the front teeth, bear the bite force is lighter, to the hospital checkup there is no need to do the crown directly fill the tooth. Root canal treatment after the crown or filling is good, with their own teeth and oral conditions, it is recommended to go to the hospital according to their own situation to choose the way that suits them.